Additive manufacturing equipment for variable-speed flight printing and variable-speed flight printing control method

Abstract

The invention relates to a variable-speed flight printing additive manufacturing device and a variable-speed flight printing control method.The variable-speed flight printing additive manufacturing device comprises two flight axis modules, two flight axis printing systems, a forming cylinder and a control system, and one flight axis module corresponds to one flight axis printing system; the flight axis module comprises a flight axis linear module, a flight axis absolute grating ruler and a flight axis printing system mounting base; the flight axis printing system comprises a forming module and a dust removal module; the flight axis printing system mounting bases are connected with the corresponding flight axis linear modules, the forming modules and the dust removal modules are connected with the corresponding flight axis printing system mounting bases, and the flight axis linear modules drive the corresponding forming modules and the dust removal modules to move in the horizontal direction of a forming area. The system can continuously and automatically run, does not need human participation, is not limited by special limitation, reduces personnel operation, avoids risks caused by personnel misoperation, improves the printing efficiency, and improves the safety coefficient of equipment and operators.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing device with variable-speed flying printing and a control method for variable-speed flying printing. Background Art

[0002] Additive manufacturing (also known as selective laser melting or metal 3D printing) technology is a new processing method that has emerged in recent years. The raw materials used in this technology are all powders with a size of dozens to hundreds of micrometers. During the forming process, the powder is evenly spread on the forming substrate through a powder feeding mechanism and a powder spreading mechanism, and then the powder in a specific geometric shape area on the surface is melted by an energy source such as a laser to produce metallurgical bonding, and finally the part grows layer by layer to achieve the process of three-dimensional forming.

[0003] The flying processing control of additive manufacturing is a high-precision processing technology that can ensure processing quality and efficiency. This technology uses a flying laser beam for processing, and the laser beam can move on the material surface while controlling the processing speed and direction to achieve high-precision processing.

[0004] Currently, based on the development trend of additive manufacturing equipment towards high-precision, high-efficiency, and large-format production methods, an n×n matrix arrangement of galvanometers for large-format equipment has emerged. However, due to the poor wind field effect and imperfect dust filtration when the format is too large, it seriously affects the printing effect, and then reduces the yield rate of equipment production. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention provides an additive manufacturing device with variable-speed flying printing and a control method for variable-speed flying printing. The device and the control method drive a forming module and a dust removal module to move horizontally in the forming area through a flying module, achieving an ultra-large-format progressive forming effect, fundamentally solving problems such as the wind field effect limitation caused by too large a format, and can partition the flying processing area, accurately calculate the time-consuming of each partition, and automatically adjust the flying speed according to the printing task volume, greatly improving the processing efficiency.

[0006] The present invention is realized as follows: An additive manufacturing device with variable-speed flying printing includes two flying axis modules, two flying axis printing systems, a forming cylinder, and a control system. One flying axis module corresponds to one flying axis printing system. The flying axis module includes a flying axis linear module, a flying axis absolute grating ruler, and a flying axis printing system mounting base. The flying axis printing system includes a forming module and a dust removal module;

[0007] The absolute grating scale for the flying axis includes a flying-axis grating scale body and a flying-axis grating scale head. The flying-axis grating scale body is fixedly arranged on the corresponding flying-axis linear module, and the flying-axis grating scale head cooperates with the corresponding flying-axis grating scale body to measure the mechanical displacement of the corresponding flying axis.

[0008] The installation base of the flying-axis printing system is connected to the corresponding flying-axis linear module. The forming module and the dust removal module are connected to the installation base of the corresponding flying-axis printing system. The flying-axis linear module drives the corresponding forming module and dust removal module to move horizontally in the forming area.

[0009] In the above technical solution, preferably, the flying-axis linear module includes a linear guide rail, a slider, and a flying-axis servo motor. The installation base of the flying-axis printing system is connected to the corresponding slider, and the flying-axis grating scale head is electrically connected to the corresponding flying-axis servo motor.

[0010] In the above technical solution, preferably, the flying-axis module further includes a transition plate for installing the flying-axis printing system. The transition plate for installing the flying-axis printing system is connected to the installation base of the flying-axis printing system. The forming module is installed above the transition plate for installing the flying-axis printing system, and the dust removal module is installed below the transition plate for installing the flying-axis printing system.

[0011] In the above technical solution, preferably, the dust removal module includes a flying-axis dust removal housing, a flying-axis dust removal air inlet, a flying-axis dust removal air outlet, and a dust removal device. The flying-axis dust removal air inlet is arranged on one side of the flying-axis dust removal housing. A grid-like structure is provided at the connection between the flying-axis dust removal air inlet and the flying-axis dust removal housing. The flying-axis dust removal air outlet is arranged on the other side of the flying-axis dust removal housing. The flying-axis dust removal air inlet is connected to the air outlet of the dust removal device through a flying-axis dust removal blowing air duct, and the flying-axis dust removal air outlet is connected to the air inlet of the dust removal device through a flying-axis dust removal suction air duct.

[0012] In the above technical solution, preferably, the equipment further includes a blade powder spreading module. The blade powder spreading module horizontally moves with the blade carrying powder to spread the powder evenly within the selected area for printing.

[0013] The variable-speed flying printing control method includes the following steps:

[0014] S1. Import the workpiece model with position coordinates into the control system, slice the model, and divide the workpiece printing area and each single galvanometer printing area;

[0015] Calculate the printing area Sn of each single galvanometer printing area within the same workpiece printing area;

[0016] According to the printing area Sn and the galvanometer scanning speed Vn, calculate the time Tn required for each single galvanometer printing area to complete printing as follows:

[0017]

[0018] According to the workpiece printing partition length Ln and the time Tn required for each single galvanometer printing partition to complete printing, calculate the theoretical flight speed Vf of the two flying axes n As follows:

[0019]

[0020] S2. Compare the theoretical flight speeds of the flying axes of each single galvanometer printing partition and set Vf 1 、Vf 2 、......、Vf n Take the minimum flight speed among them as the flight printing speed;

[0021] Among them, during printing, the flying axis one printing system starts to move from the edge of the printing partition, and the flying axis two printing system starts to move from the middle of the printing partition. The flight printing speed of the flying axis one is less than or equal to the flight printing speed of the flying axis two;

[0022] And it is set that when the moving distance data of the flying axis one is positive, it means that the moving direction of the flying axis one tends to approach the actual position of the flying axis two; when the moving distance data of the flying axis one is negative, it means that the moving direction of the flying axis one tends to move away from the actual position of the flying axis two; when the moving distance data of the flying axis two is positive, it means that the moving direction of the flying axis two tends to move away from the actual position of the flying axis one; when the moving distance data of the flying axis two is negative, it means that the moving direction of the flying axis two tends to approach the actual position of the flying axis one;

[0023] If the moving distance data of the flying axis one is positive and the value is greater than or equal to the distance between the flying axis two and the flying axis one, the control system outputs the distance between the flying axis two and the flying axis one;

[0024] If the moving distance data of the flying axis one is positive and the value is less than the distance between the flying axis two and the flying axis one, the control system outputs the moving distance data of the flying axis one;

[0025] If the moving distance data of the flying axis two is negative and the planned moving position of the flying axis two is less than or equal to the actual position of the flying axis one, the control system outputs the distance between the flying axis two and the flying axis one;

[0026] If the moving distance data of the flying axis two is negative and the planned moving position of the flying axis two is greater than the actual position of the flying axis one, the control system outputs the moving distance data of the flying axis two.

[0027] The advantages and positive effects of the present invention are:

[0028] (1) The device and its control method of the present invention can avoid mechanical collisions between two flying axes caused by speed differences during the movement of the flying axes, and can avoid the risk of mechanical damage caused by misoperations of operators; it can easily adjust the software control interface to adapt to different production requirements and meet the requirements of most anti-mechanical interference.

[0029] (2) The device and its control method of the present invention can automatically detect the distance between flying axes. When the distance is too small, it will automatically reduce the speed to match the printing conditions, solving the mechanical collision caused by the stroke intersection during the movement of the flying axes. It can automatically match the flying speed according to the printing area and scanning speed, and can improve the printing efficiency by modifying the flying axis speed in real time, solving the low efficiency problem of isospeed flying processing for large-format printing.

[0030] (3) The device of the present invention can operate continuously and automatically without human participation, is not subject to special restrictions, reduces personnel operations, avoids risks caused by human misoperations, improves the printing efficiency, and improves the safety factor of the device and operators. The flying axis module and the flying axis printing system can be applied to most flying processing devices. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of an additive manufacturing device with variable-speed flying printing provided by an embodiment of the present invention;

[0032] Figure 2 is a schematic structural diagram at the flying axis printing system provided by an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of each single galvanometer printing area provided by an embodiment of the present invention;

[0034] Figure 4 is a schematic diagram of the device starting to spread powder provided by an embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of the device after the spreading of one layer of powder is completed provided by an embodiment of the present invention;

[0036] Figure 6 is a schematic diagram of the device starting to print one layer provided by an embodiment of the present invention;

[0037] Figure 7 is a schematic diagram of the device after one layer of printing is completed provided by an embodiment of the present invention.

[0038] In the figure: 1. Flight axis grating scale body one; 2. Flight axis grating scale body two; 3. Flight axis one main axis grating scale head; 4. Flight axis two main axis grating scale head; 5. Flight axis one slave axis grating scale head; 6. Flight axis two slave axis grating scale head; 7. Galvanometer one; 8. Galvanometer two; 9. Galvanometer three; 10. Galvanometer four; 11. Galvanometer five; 12. Galvanometer six; 13. Galvanometer seven; 14. Galvanometer eight; 15. Galvanometer nine; 16. Galvanometer ten; 17. Galvanometer eleven; 18. Galvanometer twelve; 19. Galvanometer thirteen; 20. Galvanometer fourteen; 21. Galvanometer fifteen; 22. Galvanometer sixteen; 23. Flight axis one main axis servo motor; 24. Flight axis one slave axis servo motor; 25. Flight axis two main axis servo motor; 26. Flight axis two slave axis servo motor; 27. Flight axis one main axis linear module; 28. Flight axis one slave axis linear module; 29. Flight axis two main axis linear module; 30. Flight axis two slave axis linear module; 31. Flight axis one printing system installation base; 32. Flight axis two printing system installation base; 33. Flight axis one dust removal air inlet; 34. Flight axis one dust removal air outlet; 35. Flight axis two dust removal air inlet; 36. Flight axis two dust removal air outlet; 37. Flight axis one dust removal suction air duct connection port; 38. Flight axis one dust removal blowing air duct connection port; 39. Flight axis two dust removal blowing air duct connection port; 40. Flight axis two dust removal suction air duct connection port; 41. Flight axis printing system installation transition plate; 43. Flight axis dust removal housing; 44. Scraper powder spreading module; 45. Forming cylinder; 46. Workpiece. Detailed implementation manner

[0039] To further understand the content, features and effects of the present invention, the following embodiments are cited and described in detail in conjunction with the accompanying drawings as follows:

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] Please refer toFigure 1 and Figure 2 , an embodiment of the present invention provides an additive manufacturing device for variable-speed flying printing, which includes two flying axis modules, two flying axis printing systems, a forming cylinder 45 and a control system. One flying axis module corresponds to one flying axis printing system. The flying axis module includes a flying axis linear module, a flying axis absolute grating scale, and a flying axis printing system mounting base. The flying axis printing system includes a forming module and a dust removal module. This embodiment is divided into a flying axis one module, a flying axis two module, a flying axis one printing system, and a flying axis two printing system.

[0043] The flying axis absolute grating scale includes a flying axis grating scale body and a flying axis grating scale head. The flying axis grating scale body is fixedly arranged on the corresponding flying axis linear module. The flying axis grating scale body one 1 and the flying axis grating scale body two 2 are composed of grating lines engraved with absolute codes. The grating lines are evenly distributed, and the code at each position is unique. The flying axis grating scale head cooperates with the corresponding flying axis grating scale body to measure the mechanical displacement of the corresponding flying axis. The flying axis grating scale head, as a measuring and feedback device for an external encoder, cooperates with the flying axis grating scale body. Specifically, through the principle of photoelectric conversion, the mechanical displacement is read by a photoelectric detector through the change of the absolute position coding of the flying axis grating scale body, and converted into an electric signal proportional to the displacement, so as to determine the absolute position, providing reliable data support for the control system, thereby improving the stability and accuracy of the system.

[0044] The flying axis printing system mounting base is connected to the corresponding flying axis linear module. The forming module and the dust removal module are connected to the corresponding flying axis printing system mounting base. The flying axis linear module drives the corresponding forming module and dust removal module to move horizontally in the forming area.

[0045] Specifically, the flying axis linear module includes a linear guide rail, a slider, and a flying axis servo motor. The flying axis printing system mounting base is connected to the corresponding slider. The flying axis grating scale head is electrically connected to the corresponding flying axis servo motor.

[0046] The flight axis linear module is a precision transmission mechanism based on the principle of linear motion and is applied to automated equipment. It consists of a linear guide rail, a slider, and a driving mechanism, and can achieve high-precision and high-speed linear motion. Among them, the flight axis one main axis linear module 27 and the flight axis one slave axis linear module 28 are connected to the flight axis one printing system mounting base 31, and the flight axis two main axis linear modules 29 and the flight axis two slave axis linear modules 30 are connected to the flight axis two printing system mounting base 32. The flight axis one printing system mounting base 31 moves linearly in the horizontal direction driven by the flight axis one main axis linear module 27 and the flight axis one slave axis linear module 28, and the flight axis two printing system mounting base 32 moves linearly in the horizontal direction driven by the flight axis two main axis linear modules 29 and the flight axis two slave axis linear modules 30.

[0047] The flight axis servo motor is a motor dedicated to precisely controlling mechanical displacement, speed, and acceleration. It realizes the closed-loop control of the flight axis through the external scale head of the flight axis and achieves high-speed and precise adjustment of the motion state of the flight axis. Among them, the flight axis one main axis servo motor 23 is the main axis motion execution mechanism of the flight axis one, the flight axis one main axis grating scale head 3 is the displacement measurement mechanism of the flight axis one, the flight axis one slave axis servo motor 24 is the slave axis motion execution mechanism of the flight axis one, and the flight axis one slave axis grating scale head 5 is the displacement measurement mechanism of the flight axis one; the flight axis two main axis servo motors 25 are the main axis motion execution mechanisms of the flight axis two, the flight axis two main axis grating scale heads 4 are the displacement measurement mechanisms of the flight axis two, the flight axis two slave axis servo motors 26 are the slave axis motion execution mechanisms of the flight axis two, and the flight axis two slave axis grating scale heads 6 are the displacement measurement mechanisms of the flight axis two.

[0048] The control system issues instructions to control the flight axis one main axis servo motor 23 and the flight axis one slave axis servo motor 24 to perform positioning movements, and through electronic cam motion, makes the two maintain relative parallel motion, and based on the real-time feedback of mechanical position data by the flight axis one main axis grating scale head 3 and the flight axis one slave axis grating scale head 5, obtains an electronic cam table by comparing the position data, and compares it with the manual measurement data table during actual installation to correct the electronic cam table, and finally can obtain the electronic cam table data that meets the horizontal parallel movement of the main and slave axes of the flight axis one.

[0049] The flight axis module further includes a flight axis printing system installation transition plate. The flight axis printing system installation transition plate is connected to the flight axis printing system mounting base. The forming module is installed above the flight axis printing system installation transition plate, and the dust removal module is installed below the flight axis printing system installation transition plate.

[0050] The installation transition plate 41 of the first flying axis printing system and the installation transition plate of the second flying axis printing system are responsible for carrying and installing the galvanometer of the forming module and optical components such as the required optical lenses, as well as the dust removal module. A galvanometer is a device that controls an optical scanning head to drive an optical reflecting lens to deflect through the principle of electromagnetic induction, so as to achieve high-speed and accurate scanning and positioning of the incident light beam. Cooperating with a laser, it can perform laser marking, laser cutting and other processing operations on materials.

[0051] The dust removal module includes a flying axis dust removal housing, a flying axis dust removal air inlet, a flying axis dust removal air outlet, and a dust removal device. The flying axis dust removal air inlet is arranged on one side of the flying axis dust removal housing. A grid-like structure is arranged at the connection between the flying axis dust removal air inlet and the flying axis dust removal housing. The flying axis dust removal air outlet is arranged on the other side of the flying axis dust removal housing. The flying axis dust removal air inlet is connected to the air outlet of the dust removal device through a flying axis dust removal blowing air duct. The flying axis dust removal air outlet is connected to the air inlet of the dust removal device through a flying axis dust removal suction air duct.

[0052] The housing 43 of the first flying axis dust removal system and the housing of the second flying axis dust removal system can maintain a stable air flow and environment. By optimizing the layout of the dust removal module, the air flow interference in the printing area can be reduced. The first flying axis dust removal air inlet 33 and the second flying axis dust removal air inlet 35 can change the circulating air direction of the pipeline through a grid-like structure. The connection ports 38 of the first flying axis dust removal blowing air duct and the connection ports 39 of the second flying axis dust removal blowing air duct are used to connect the hoses of external dust removal devices to blow air into the flying axis dust removal housing. The first flying axis dust removal air outlet 34 and the second flying axis dust removal air outlet 36 can utilize the suction force of the dust removal device (dust removal circulating fan) to change the air flow direction in the flying axis dust removal housing 43, wrap the dust generated by printing, and connect to the external dust removal device through the connection ports 37 of the first flying axis dust removal suction air duct and the connection ports 40 of the second flying axis dust removal suction air duct. The flying axis dust removal housing 43 moves with the flying axis module to achieve the effect of dust removal during processing, and the dust removal effect in the processing area can be maintained highly efficient and stable.

[0053] The device further includes a scraper powder spreading module. The scraper powder spreading module 44 horizontally moves the powder through a scraper and spreads the powder evenly within the selected area for printing.

[0054] As Figures 3 to 7 shown, the variable-speed flying printing control method includes the following steps:

[0055] S1. Import the workpiece model with position coordinates into the control system, slice the model and divide the workpiece printing area and each single galvanometer printing area;

[0056] Calculate the printing area Sn of each single galvanometer printing area within the same workpiece printing area; the printing areas of each single galvanometer printing area within the same workpiece printing area are S1, S2, S3, S4, S5, S6, S7, S8 in sequence, and it can be obtained that S4 = S5 > S3 = S6 > S2 = S7 > S1 = S8.

[0057] According to the printing area Sn and the galvanometer scanning speed Vn, calculate the time Tn required for each single galvanometer printing area to complete printing as follows:

[0058]

[0059] According to the length Ln of the workpiece printing area and the time Tn required for each single galvanometer printing area to complete printing, calculate the theoretical flying speeds Vf of the two flying axes n as follows:

[0060]

[0061] S2. Compare the theoretical flying speeds of the flying axes of each single galvanometer printing area. To ensure that each galvanometer printing area can be completed completely, set the minimum flying speed among Vf 1 、Vf 2 、......、Vf n as the flying printing speed;

[0062] Among them, during printing, the flying axis one printing system starts to move from the edge of the printing area, and the flying axis two printing system starts to move from the middle of the printing area. The flying printing speed of the flying axis one needs to be less than or equal to the flying printing speed of the flying axis two to ensure that the two flying axes will not collide and interfere during actual operation. If the flying printing speed of the flying axis one is greater than the flying printing speed of the flying axis two, there will be a problem of too small flying spacing, which will damage the mechanical mechanism. This setting is for the speed limit protection when the flying axis one and the flying axis two are moving forward.

[0063] The stroke protection of the flying axis one and the flying axis two is to solve the problem that according to the actual positions of the flying axis one and the flying axis two, the absolute target position setting value of the flying axis during flight is limited through an algorithm to avoid the occurrence of flying axis collision within the stroke overlap area. When the flying axis one needs to move, the user or the printing system will input the moving distance data of the flying axis one.

[0064] And it is set that when the moving distance data of flight axis 1 is positive, it means that the moving direction of flight axis 1 tends to approach the actual position of flight axis 2; when the moving distance data of flight axis 1 is negative, it means that the moving direction of flight axis 1 tends to move away from the actual position of flight axis 2; when the moving distance data of flight axis 2 is positive, it means that the moving direction of flight axis 2 tends to move away from the actual position of flight axis 1; when the moving distance data of flight axis 2 is negative, it means that the moving direction of flight axis 2 tends to approach the actual position of flight axis 1.

[0065] If the moving distance data of flight axis 1 is positive and the value is greater than or equal to the distance between flight axis 2 and flight axis 1, the control system outputs the distance between flight axis 2 and flight axis 1.

[0066] If the moving distance data of flight axis 1 is positive and the value is less than the distance between flight axis 2 and flight axis 1, the control system outputs the moving distance data of flight axis 1.

[0067] If the moving distance data of flight axis 2 is negative and the planned moving position of flight axis 2 is less than or equal to the actual position of flight axis 1, it is considered that there is a risk of collision, and the control system outputs the distance between flight axis 2 and flight axis 1.

[0068] If the moving distance data of flight axis 2 is negative and the planned moving position of flight axis 2 is greater than the actual position of flight axis 1, the control system outputs the moving distance data of flight axis 2.

[0069] The above operations can ensure that when flight axis 1 and flight axis 2 move towards each other, the actual travel will not cross, fundamentally avoiding the risks of mechanical collision and interference.

[0070] The above description is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. An additive manufacturing device with variable speed on-the-fly printing, characterized in that: It includes two flight axis modules, two flight axis printing systems, a molding cylinder and a control system. One flight axis module corresponds to one flight axis printing system. The flight axis module includes a flight axis linear module, a flight axis absolute grating ruler, and a flight axis printing system mounting base. The flight axis printing system includes a molding module and a dust removal module. The flight axis absolute grating ruler comprises a flight axis grating ruler body and a flight axis grating ruler head. The flight axis grating ruler body is fixedly arranged on the corresponding flight axis linear module. The flight axis grating ruler head cooperates with the corresponding flight axis grating ruler body to measure the mechanical displacement of the corresponding flight axis. The flight axis printing system mounting base is connected to the corresponding flight axis linear module, the molding module and the dust removal module are connected to the corresponding flight axis printing system mounting base, and the flight axis linear module drives the corresponding molding module and the dust removal module to move horizontally in the molding area.

2. The variable speed on-the-fly printing additive manufacturing device according to claim 1, characterized in that: The flight axis linear module includes a linear guide rail, a slider, and a flight axis servo motor. The flight axis printing system mounting base is connected to the corresponding slider, and the flight axis grating ruler head is electrically connected to the corresponding flight axis servo motor.

3. The variable speed on-the-fly printing additive manufacturing device according to claim 1, characterized in that: The flight axis module also includes a flight axis printing system installation transition plate, the flight axis printing system installation transition plate is connected to the flight axis printing system installation base, the molding module is installed above the flight axis printing system installation transition plate, and the dust removal module is installed below the flight axis printing system installation transition plate.

4. The variable speed on-the-fly printing additive manufacturing device according to claim 1, characterized in that: The dust removal module includes a flight axis dust removal shell, a flight axis dust removal air inlet, a flight axis dust removal air outlet, and a dust removal device. The flight axis dust removal air inlet is arranged on one side of the flight axis dust removal shell, and a grid mesh structure is arranged at the connection between the flight axis dust removal air inlet and the flight axis dust removal shell. The flight axis dust removal air outlet is arranged on the other side of the flight axis dust removal shell. The flight axis dust removal air inlet is connected to the air outlet of the dust removal device through a flight axis dust removal air blowing outlet pipeline, and the flight axis dust removal air outlet is connected to the air inlet of the dust removal device through a flight axis dust removal air suction outlet pipeline.

5. The variable speed on-the-fly printing additive manufacturing device according to claim 1, characterized in that: The device also includes a scraper powder spreading module, which carries the powder through the scraper and moves horizontally to spread the powder to the selected printing range.

6. A variable speed flying printing control method, characterized in that: The control method is implemented based on the additive manufacturing device according to any one of claims 1 to 5, and comprises the following steps: S1. Import the workpiece model with position coordinates into the control system, slice the model and divide it into workpiece printing partitions and each single galvanometer printing partition; Calculate the printing area Sn of each single galvanometer printing zone in the same workpiece printing zone; According to the printing area Sn and the galvanometer scanning speed Vn, the time Tn required for each single galvanometer printing partition to complete printing is calculated as follows: According to the workpiece printing partition length Ln and the time Tn required for each single galvanometer printing partition to complete printing, calculate the theoretical flight speed Vf of the two flight axes n as follows: S2, compare the theoretical flight speed of the flight axis of each single galvanometer printing partition, set Vf1, Vf2, ..., Vf n The minimum flight speed in is used as the flight printing speed; During printing, the printing system of flight axis 1 starts to move from the edge of the printing zone, and the printing system of flight axis 2 starts to move from the middle of the printing zone. The flight printing speed of flight axis 1 is less than or equal to the flight printing speed of flight axis 2. And it is set that when the flight axis one moving distance data is a positive value, it means that the movement direction of the flight axis one tends to approach the actual position of the flight axis two; when the flight axis one moving distance data is a negative value, it means that the movement direction of the flight axis one tends to move away from the actual position of the flight axis two; when the flight axis two moving distance data is a positive value, it means that the movement direction of the flight axis two tends to move away from the actual position of the flight axis one; when the flight axis two moving distance data is a negative value, it means that the movement direction of the flight axis two tends to approach the actual position of the flight axis one; If the moving distance data of flight axis 1 is positive and the value is greater than or equal to the distance between flight axis 2 and flight axis 1, the control system outputs the distance between flight axis 2 and flight axis 1; If the flight axis one moving distance data is a positive value and the value is smaller than the distance between the flight axis two and the flight axis one, the control system outputs the flight axis one moving distance data; If the moving distance data of flight axis 2 is a negative value, and the planned moving position of flight axis 2 is less than or equal to the actual position of flight axis 1, the control system outputs the distance between flight axis 2 and flight axis 1; If the flight axis two moving distance data is a negative value, and the flight axis two planned moving position is greater than the flight axis one actual position, the control system outputs the flight axis two moving distance data.

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